Table: fix high CPU consumption

packages/table/src/table.vue

@@ -4,7 +4,6 @@
       'el-table--fit': fit,
       'el-table--striped': stripe,
       'el-table--border': border,
-      'el-table--hidden': isHidden,
       'el-table--fluid-height': maxHeight,
       'el-table--enable-row-hover': !store.states.isComplex,
       'el-table--enable-row-transition': (store.states.data || []).length !== 0 && (store.states.data || []).length < 100
@@ -294,12 +293,6 @@
           } else if (this.shouldUpdateHeight) {
             this.layout.updateHeight();
           }
-          if (this.$el) {
-            this.isHidden = this.$el.clientWidth === 0;
-            if (this.isHidden && this.layout.bodyWidth) {
-              setTimeout(() => this.doLayout());
-            }
-          }
         });
       }
     },
@@ -460,7 +453,6 @@
       return {
         store,
         layout,
-        isHidden: false,
         renderExpanded: null,
         resizeProxyVisible: false
       };